http://www.dnmcomputers.net/wordpress-adsense-sidebar/
How do I get Google AdSense to work on my Wordpress blog?
I made the ad and copied and pasted the code into the sidebar widget "text" but it isn't showing up on my blog site. How come?
with the free wordpress.com blog you are not allowed to ad Adsense as they do not allow java coding. However, you can move your blog to a blogger.com blog (which is run by google) which easily allows you to integrate Adsense. I made this same mistake you did and was able to set up a new blog.... http://moviation.blogspot.com/
Google Adsense for Wordpress Sidebar (Widget/Plugin)
